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/**
* Flake: FLAC audio encoder
* Copyright (c) 2006 Justin Ruggles
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef FLAC_H
#define FLAC_H
#include "config.h"
#include <inttypes.h>
#include "flake.h"
#include "rice.h"
#include "lpc.h"
#include "md5.h"
#define FLAC_MAX_CH 8
#define FLAC_MIN_BLOCKSIZE 16
#define FLAC_MAX_BLOCKSIZE 65535
#define FLAC_SUBFRAME_CONSTANT 0
#define FLAC_SUBFRAME_VERBATIM 1
#define FLAC_SUBFRAME_FIXED 8
#define FLAC_SUBFRAME_LPC 32
#define FLAC_CHMODE_NOT_STEREO 0
#define FLAC_CHMODE_LEFT_RIGHT 1
#define FLAC_CHMODE_LEFT_SIDE 8
#define FLAC_CHMODE_RIGHT_SIDE 9
#define FLAC_CHMODE_MID_SIDE 10
#define FLAC_STREAM_MARKER 0x664C6143
struct BitWriter;
typedef struct FlacSubframe {
int type;
int type_code;
int order;
int obits;
int32_t coefs[MAX_LPC_ORDER];
int shift;
int32_t samples[FLAC_MAX_BLOCKSIZE];
int32_t residual[FLAC_MAX_BLOCKSIZE];
RiceContext rc;
} FlacSubframe;
typedef struct FlacFrame {
int blocksize;
int bs_code[2];
int ch_mode;
int ch_order[2];
uint8_t crc8;
FlacSubframe subframes[FLAC_MAX_CH];
} FlacFrame;
typedef struct FlacEncodeContext {
int channels;
int ch_code;
int samplerate;
int sr_code[2];
int bps;
int bps_code;
uint32_t sample_count;
FlakeEncodeParams params;
int max_frame_size;
int lpc_precision;
uint32_t frame_count;
FlacFrame frame;
MD5Context md5ctx;
struct BitWriter *bw;
} FlacEncodeContext;
extern int encode_frame(FlakeContext *s, uint8_t *frame_buffer, int16_t *samples);
#endif /* FLAC_H */
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